84 Commits
480d4f4f3b
...
b139b6556d
Jenkins
Fabian Vowie
Roman Zipp
27 changed files with 1783 additions and 117 deletions
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7.gitignore
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297README.md
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3build.sh
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21config/example.json
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12go.mod
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38go.sum
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11lithium.log
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16lithium.md
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193main.go
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106main_test.go
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28middlewares/authorization.go
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50middlewares/authorization_test.go
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43middlewares/ratelimiter.go
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64middlewares/ratelimiter_test.go
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99pipelines/executable_step.go
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18pipelines/executable_step_test.go
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67pipelines/pipeline.go
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541pipelines/pipeline_test.go
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39pipelines/step.go
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3pipelines/step_test.go
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16settings.json
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91settings/settings.go
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57settings/settings_test.go
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57storage/storage.go
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23storage/storage_test.go
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BINtests/files/800x500.jpg
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BINtests/files/900x900.jpg
@ -0,0 +1,297 @@ |
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# Lithium |
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Micro-service for file storage and processing written in Go. |
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## Features |
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- Image processing pipelines for various transformations |
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- Web API for storing & retrieving files |
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## Requirements |
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- [Go 1.17+](https://go.dev/) |
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- [_Docker_](https://docs.docker.com/) (optional) |
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## Setup |
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#### 1. Clone repository |
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```shell |
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git clone git@gogs.informatik.hs-fulda.de:FabianVowie/Lithium.git |
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``` |
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#### 2. Pull dependencies |
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```shell |
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go get |
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``` |
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#### 3. Build & start application |
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```shell |
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go run . |
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``` |
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**Run using [Docker](https://docs.docker.com/) container** |
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```shell |
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docker run --rm -p 8000:8000 -v "$PWD":/usr/src/lithium -w /usr/src/lithium golang:1.17 go run . |
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``` |
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## Testing |
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```shell |
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go test ./... |
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``` |
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### Run tests in verbose logging mode |
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```shell |
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go test ./... -v |
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``` |
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### Run tests in [Docker](https://docs.docker.com/) container |
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```shell |
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docker run --rm -v "$PWD":/usr/src/lithium -w /usr/src/lithium golang:1.17 go test ./... |
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``` |
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## Configuration |
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Config options can be adjusted via the [`settings.json`](settings.json) file in the root directory. |
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```json |
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{ |
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"endpoint": "0.0.0.0:8000", |
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"token": "changeme", |
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"rate_limiter": { |
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"requests_per_minute": 20, |
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"allowed_burst": 5 |
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}, |
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"storage_provider": { |
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"type": 0, |
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"base_path": "assets" |
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} |
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} |
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``` |
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## Rate Limiting |
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By default, the rate limiting takes place on a per-route basis. When the limit for a specific route is hit, the response will return a status code `429: Too Many Requests`. |
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| Headers | Explanation | |
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| --------------------- | -------------------------------- | |
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| X-Ratelimit-Limit | Allowed requests per minute | |
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| X-Ratelimit-Remaining | Remaining requests | |
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| X-Ratelimit-Reset | Seconds until requests replenish | |
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## API |
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### `GET` `/` |
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Show application information. |
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**Required headers**: |
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```shell |
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Authorization: Bearer <Token> |
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``` |
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**Example response**: |
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```json |
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{ |
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"name": "Lithium", |
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"version": "0.1.0" |
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} |
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``` |
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### `GET` `/pipelines/{pipeline}` |
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Show pipeline information. |
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**Required headers**: |
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```shell |
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Authorization: Bearer <Token> |
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``` |
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**Example response**: |
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```json |
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{ |
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"name": "example pipeline", |
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"slug": "example", |
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"type": 0, |
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"remove_metadata": false, |
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"steps": [ |
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{ |
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"name": "resize image", |
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"type": 0, |
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"options": { |
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"width": 1280, |
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"height": 720, |
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"upscale": false |
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} |
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} |
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], |
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"output": { |
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"format": "jpg", |
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"quality": 90 |
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} |
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} |
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``` |
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## Pipelines |
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The project uses a pipeline system defined by [JSON](https://en.wikipedia.org/wiki/JSON) files located in the [config](config) folder. |
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Take a look at the [example pipeline configuration file](config/example.json). |
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Available pipeline `type`s: `0` (Image), `1` (Video) |
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```json |
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{ |
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"name": "example pipeline", |
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"slug": "example", |
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"type": 0, |
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"removeMetadata": false, |
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"steps": [], |
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"output": {} |
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} |
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``` |
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### Images pipeline |
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The image pipeline offers the following additional output options. |
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Available `format` types: `jpg` (or `jpeg`), `png`, `gif`, `tif` (or `tiff`) and `bmp` |
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The `quality` field can contain any integer between 1 and 100. |
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```json |
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{ |
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"output": { |
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"format": "jpg", |
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"quality": 90 |
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} |
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} |
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``` |
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### Available pipeline steps |
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Each pipeline step consists of an optional `name`, a predefined `type` and configurable `options`. |
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See the available options below for more information. |
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```json |
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{ |
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"name": "step name", |
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"type": 0, |
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"options": {} |
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} |
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``` |
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#### Resizing images |
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Resize an image by a given `width` and `height`. |
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**Step definition**: |
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```json |
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{ |
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"type": 0, |
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"options": { |
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"width": 1280, |
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"height": 720 |
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} |
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} |
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``` |
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#### Rotating images |
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Rotate an image with a given `angle` in degrees. |
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**Step definition**: |
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```json |
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{ |
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"type": 1, |
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"options": { |
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"angle": 90.0 |
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} |
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} |
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``` |
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#### Flipping images |
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Flip an image with a given direction. |
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Allowed values for the `direction` option are `"h"` (horizontal), `"v"` (vertical) |
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**Step definition**: |
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```json |
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{ |
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"type": 2, |
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"options": { |
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"direction": "h" |
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} |
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} |
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``` |
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#### Grayscale |
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Convert the colorspace of an image into grayscale. |
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**Step definition**: |
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```json |
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{ |
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"type": 3 |
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} |
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``` |
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#### Fit |
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Scales down the image to fit the specified maximum width and height. |
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**Step definition**: |
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```json |
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{ |
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"type": 4, |
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"options": { |
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"height": 300, |
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"width": 200 |
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} |
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} |
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``` |
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#### Invert |
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Invert image colors. |
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**Step definition**: |
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```json |
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{ |
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"type": 5 |
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} |
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``` |
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#### Blur |
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Blur image using Gaussian functions. |
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**Step definition**: |
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```json |
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{ |
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"type": 6, |
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"options": { |
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"sigma": 50.0 |
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} |
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} |
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``` |
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## Authors |
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- [Fabian Vowie](https://gogs.informatik.hs-fulda.de/FabianVowie) |
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- [Roman Zipp](https://gogs.informatik.hs-fulda.de/roman.zipp) |
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@ -0,0 +1,3 @@ |
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#!/bin/bash |
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GIT_COMMIT=$(git rev-parse --short HEAD); go build -ldflags "-X main.GitCommit=$GIT_COMMIT" |
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@ -0,0 +1,11 @@ |
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{"level":"info","msg":"Pipeline routes registered successfully","time":"2022-01-23T18:28:12+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-01-23T18:28:12+01:00"} |
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{"level":"info","msg":"Pipeline routes registered successfully","time":"2022-01-23T18:28:17+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-01-23T18:28:17+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-01-26T17:37:28+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-01-26T17:47:13+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-01-26T17:48:17+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-02-06T15:30:47+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-02-06T15:38:27+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-02-06T15:45:25+01:00"} |
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{"level":"info","msg":"Lithium started, listening for requests...","time":"2022-02-06T16:03:30+01:00"} |
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@ -1,16 +0,0 @@ |
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# Lithium |
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Micro-service for file storage and processing. |
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## Features |
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- File storing with various providers |
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- S3 (or S3 compatible like MinIO) |
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- Locally (for development purposes) |
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- File processing "pipelines" for various formats |
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- Compression, Resizing for images |
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- Encoding for videos |
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- Remove metadata (e.g. EXIF) |
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- File-based configuration for pipelines |
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- JSON/YAML/TOML? |
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- Web api to store and retrieve files |
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@ -0,0 +1,28 @@ |
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package middlewares |
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import ( |
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"net/http" |
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"strings" |
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) |
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type AuthenticationMiddleware struct { |
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secret string |
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} |
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func (middleware AuthenticationMiddleware) Middleware(next http.Handler) http.Handler { |
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
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authToken := r.Header.Get("Authorization") |
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if authToken == "" || strings.HasPrefix(authToken, "Bearer ") == false || authToken[7:] != middleware.secret { |
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http.Error(w, "Forbidden", http.StatusForbidden) |
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} else { |
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next.ServeHTTP(w, r) |
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} |
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}) |
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} |
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func CreateAuthenticationMiddleware(secret string) AuthenticationMiddleware { |
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return AuthenticationMiddleware{ |
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secret, |
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} |
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} |
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package middlewares |
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import ( |
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"net/http" |
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"net/http/httptest" |
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"testing" |
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"github.com/bxcodec/faker/v3" |
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"github.com/stretchr/testify/assert" |
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) |
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func TestAuthenticationMiddleware(t *testing.T) { |
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token := faker.Word() |
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middleware := CreateAuthenticationMiddleware(token) |
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handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
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w.WriteHeader(http.StatusOK) |
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}) |
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middlewareHandler := middleware.Middleware(handler) |
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t.Run("AuthenticationMiddleware returns 403 response when authorization header is incorrect", func(t *testing.T) { |
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request, _ := http.NewRequest("GET", "/", nil) |
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responseRecorder := httptest.NewRecorder() |
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middlewareHandler.ServeHTTP(responseRecorder, request) |
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assert.Equal(t, 403, responseRecorder.Code) |
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}) |
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t.Run("AuthenticationMiddleware returns 403 response when authorization header is missing Bearer prefix", func(t *testing.T) { |
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request, _ := http.NewRequest("GET", "/", nil) |
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request.Header.Set("Authorization", token) |
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responseRecorder := httptest.NewRecorder() |
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middlewareHandler.ServeHTTP(responseRecorder, request) |
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assert.Equal(t, 403, responseRecorder.Code) |
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}) |
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t.Run("AuthenticationMiddleware continues when authorization header is correct", func(t *testing.T) { |
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request, _ := http.NewRequest("GET", "/", nil) |
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request.Header.Set("Authorization", "Bearer "+token) |
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responseRecorder := httptest.NewRecorder() |
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middlewareHandler.ServeHTTP(responseRecorder, request) |
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assert.Equal(t, 200, responseRecorder.Code) |
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}) |
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} |
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package middlewares |
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import ( |
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"net/http" |
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"github.com/throttled/throttled/store/memstore" |
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"github.com/throttled/throttled/v2" |
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) |
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type RateLimiterMiddleware struct { |
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rateLimiter throttled.HTTPRateLimiter |
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} |
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func (middleware RateLimiterMiddleware) Middleware(next http.Handler) http.Handler { |
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return middleware.rateLimiter.RateLimit(next) |
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} |
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func CreateRateLimiterMiddleware(requestsPerMinute int, allowedBurst int) (*RateLimiterMiddleware, error) { |
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store, err := memstore.New(65536) |
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if err != nil { |
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return nil, err |
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} |
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quota := throttled.RateQuota{ |
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MaxRate: throttled.PerMin(requestsPerMinute), |
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MaxBurst: allowedBurst, |
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} |
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|
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rateLimiter, err := throttled.NewGCRARateLimiter(store, quota) |
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if err != nil { |
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return nil, err |
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} |
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httpRateLimiter := throttled.HTTPRateLimiter{ |
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RateLimiter: rateLimiter, |
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VaryBy: &throttled.VaryBy{Path: true}, |
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} |
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return &RateLimiterMiddleware{ |
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rateLimiter: httpRateLimiter, |
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}, nil |
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} |
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@ -0,0 +1,64 @@ |
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package middlewares |
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|
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import ( |
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"net/http" |
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"net/http/httptest" |
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"testing" |
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|
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"github.com/stretchr/testify/assert" |
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) |
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|
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func ExecuteRequest(middlewareHandler http.Handler) int { |
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request, _ := http.NewRequest("GET", "/", nil) |
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responseRecorder := httptest.NewRecorder() |
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|
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middlewareHandler.ServeHTTP(responseRecorder, request) |
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return responseRecorder.Code |
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} |
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|
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func TestRateLimiterMiddleware(t *testing.T) { |
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handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
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w.WriteHeader(http.StatusOK) |
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}) |
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|
||||
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t.Run("AuthorizationMiddleware returns 200 response when rate limit is not hit", func(t *testing.T) { |
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middleware, err := CreateRateLimiterMiddleware(1, 0) |
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assert.Nil(t, err) |
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|
|
||||
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middlewareHandler := middleware.Middleware(handler) |
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|
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assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
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}) |
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|
||||
|
t.Run("AuthorizationMiddleware returns 429 response when rate limit is hit", func(t *testing.T) { |
||||
|
middleware, err := CreateRateLimiterMiddleware(1, 0) |
||||
|
assert.Nil(t, err) |
||||
|
|
||||
|
middlewareHandler := middleware.Middleware(handler) |
||||
|
|
||||
|
assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
||||
|
assert.Equal(t, 429, ExecuteRequest(middlewareHandler)) |
||||
|
}) |
||||
|
|
||||
|
t.Run("AuthorizationMiddleware returns 200 response when rate limit with burst is not hit", func(t *testing.T) { |
||||
|
middleware, err := CreateRateLimiterMiddleware(1, 1) |
||||
|
assert.Nil(t, err) |
||||
|
|
||||
|
middlewareHandler := middleware.Middleware(handler) |
||||
|
|
||||
|
assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
||||
|
assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
||||
|
}) |
||||
|
|
||||
|
t.Run("AuthorizationMiddleware returns 429 response when rate limit with burst is hit", func(t *testing.T) { |
||||
|
middleware, err := CreateRateLimiterMiddleware(1, 1) |
||||
|
assert.Nil(t, err) |
||||
|
|
||||
|
middlewareHandler := middleware.Middleware(handler) |
||||
|
|
||||
|
assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
||||
|
assert.Equal(t, 200, ExecuteRequest(middlewareHandler)) |
||||
|
assert.Equal(t, 429, ExecuteRequest(middlewareHandler)) |
||||
|
}) |
||||
|
} |
||||
@ -0,0 +1,16 @@ |
|||||
|
{ |
||||
|
"endpoint": "127.0.0.1:8000", |
||||
|
"authentication": { |
||||
|
"enabled": true, |
||||
|
"token": "changeme" |
||||
|
}, |
||||
|
"rate_limiter": { |
||||
|
"enabled": true, |
||||
|
"requests_per_minute": 20, |
||||
|
"allowed_burst": 5 |
||||
|
}, |
||||
|
"storage_provider": { |
||||
|
"type": 0, |
||||
|
"base_path": "assets" |
||||
|
} |
||||
|
} |
||||
@ -0,0 +1,91 @@ |
|||||
|
package settings |
||||
|
|
||||
|
import ( |
||||
|
"encoding/json" |
||||
|
"os" |
||||
|
"path/filepath" |
||||
|
|
||||
|
"github.com/spf13/afero" |
||||
|
) |
||||
|
|
||||
|
const ( |
||||
|
Local FileSystemType = iota |
||||
|
) |
||||
|
|
||||
|
type FileSystemType int |
||||
|
|
||||
|
type Settings struct { |
||||
|
Endpoint string `json:"endpoint"` |
||||
|
Authentication AuthenticationSettings `json:"authentication"` |
||||
|
RateLimiter RateLimiterSettings `json:"rate_limiter"` |
||||
|
StorageProvider StorageSettings `json:"storage_provider"` |
||||
|
} |
||||
|
|
||||
|
type StorageSettings struct { |
||||
|
Type FileSystemType `json:"type"` |
||||
|
BasePath string `json:"base_path"` |
||||
|
} |
||||
|
|
||||
|
type AuthenticationSettings struct { |
||||
|
Enabled bool `json:"enabled"` |
||||
|
Token string `json:"token"` |
||||
|
} |
||||
|
|
||||
|
type RateLimiterSettings struct { |
||||
|
Enabled bool `json:"enabled"` |
||||
|
RequestsPerMinute int `json:"requests_per_minute"` |
||||
|
AllowedBurst int `json:"allowed_burst"` |
||||
|
} |
||||
|
|
||||
|
func parseSettings(data []byte) Settings { |
||||
|
settings := Settings{} |
||||
|
|
||||
|
err := json.Unmarshal(data, &settings) |
||||
|
if err != nil { |
||||
|
return Settings{} |
||||
|
} |
||||
|
|
||||
|
return settings |
||||
|
} |
||||
|
|
||||
|
func LoadSettings(fileSystem afero.Fs) (Settings, error) { |
||||
|
workingDirectory, _ := os.Getwd() |
||||
|
path := filepath.Join(workingDirectory, "settings.json") |
||||
|
|
||||
|
// Load file and parse file
|
||||
|
data, err := afero.ReadFile(fileSystem, path) |
||||
|
|
||||
|
if err == nil { |
||||
|
return parseSettings(data), nil |
||||
|
} |
||||
|
|
||||
|
// If file does not exist, create default settings
|
||||
|
defaultSettings := Settings{ |
||||
|
Endpoint: "127.0.0.1:8000", |
||||
|
Authentication: AuthenticationSettings{ |
||||
|
Enabled: false, |
||||
|
Token: "changeme", |
||||
|
}, |
||||
|
RateLimiter: RateLimiterSettings{ |
||||
|
Enabled: true, |
||||
|
RequestsPerMinute: 20, |
||||
|
AllowedBurst: 5, |
||||
|
}, |
||||
|
StorageProvider: StorageSettings{ |
||||
|
Type: Local, |
||||
|
BasePath: "assets", |
||||
|
}, |
||||
|
} |
||||
|
|
||||
|
serializedSettings, err := json.MarshalIndent(defaultSettings, "", "\t") |
||||
|
if err != nil { |
||||
|
return Settings{}, err |
||||
|
} |
||||
|
|
||||
|
err = afero.WriteFile(fileSystem, path, serializedSettings, os.ModePerm) |
||||
|
if err != nil { |
||||
|
return Settings{}, err |
||||
|
} |
||||
|
|
||||
|
return defaultSettings, nil |
||||
|
} |
||||
@ -0,0 +1,57 @@ |
|||||
|
package settings |
||||
|
|
||||
|
import ( |
||||
|
"os" |
||||
|
"path/filepath" |
||||
|
"testing" |
||||
|
|
||||
|
"github.com/spf13/afero" |
||||
|
"github.com/stretchr/testify/assert" |
||||
|
) |
||||
|
|
||||
|
func TestSettingsParsing(t *testing.T) { |
||||
|
const file string = `{ |
||||
|
"endpoint": "0.0.0.0:8000", |
||||
|
"authentication": { |
||||
|
"enabled": true, |
||||
|
"token": "foobar" |
||||
|
}, |
||||
|
"rate_limiter": { |
||||
|
"enabled": true, |
||||
|
"requests_per_minute": 20, |
||||
|
"allowed_burst": 5 |
||||
|
}, |
||||
|
"storage_provider": { |
||||
|
"type": 0, |
||||
|
"base_path": "assets" |
||||
|
} |
||||
|
}` |
||||
|
|
||||
|
t.Run("Settings parsing is successful", func(t *testing.T) { |
||||
|
settings := parseSettings([]byte(file)) |
||||
|
|
||||
|
assert.Equal(t, "0.0.0.0:8000", settings.Endpoint) |
||||
|
assert.Equal(t, "foobar", settings.Authentication.Token) |
||||
|
assert.Equal(t, "assets", settings.StorageProvider.BasePath) |
||||
|
}) |
||||
|
} |
||||
|
|
||||
|
func TestSettingsLoading(t *testing.T) { |
||||
|
t.Run("Settings loading creates default settings.json when none is present", func(t *testing.T) { |
||||
|
fileSystem := afero.NewMemMapFs() |
||||
|
workingDirectory, _ := os.Getwd() |
||||
|
|
||||
|
path := filepath.Join(workingDirectory, "settings.json") |
||||
|
|
||||
|
// Settings file does not exist in the beginning
|
||||
|
doesFileExist, _ := afero.Exists(fileSystem, path) |
||||
|
assert.False(t, doesFileExist) |
||||
|
|
||||
|
_, err := LoadSettings(fileSystem) |
||||
|
assert.Nil(t, err) |
||||
|
|
||||
|
// Settings file should be present after calling LoadSettings
|
||||
|
doesFileExist, _ = afero.Exists(fileSystem, path) |
||||
|
assert.True(t, doesFileExist) |
||||
|
}) |
||||
|
} |
||||
|
Before Width: 800 | Height: 500 | Size: 66 KiB After Width: 800 | Height: 500 | Size: 66 KiB |
|
Before Width: 900 | Height: 900 | Size: 128 KiB After Width: 900 | Height: 900 | Size: 128 KiB |
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